9) A well is located in a confined aquifer near the intersection of a constant head and impervious boundary. a) Estimate the steady state drawdown in the well for Q=2 ft³ s, rw = 1 ft, distance from the well to stream= 300ft and distance from well to impervious boundary= 150 ft. T =0.14ft2/s b) Estimate the steady state drawdown at point P located midway between the well and the steam. The angle between the stream and the impervious boundary is 90°

9) A well is located in a confined aquifer near the intersection of a constant head and impervious boundary. a) Estimate the steady state drawdown in the well for Q=2 ft³ s, rw = 1 ft, distance from the well to stream= 300ft and distance from well to impervious boundary= 150 ft. T =0.14ft2/s b) Estimate the steady state drawdown at point P located midway between the well and the steam. The angle between the stream and the impervious boundary is 90°

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A well is pumping at an unknown, steady rate in a confined aquifer. Near the pumping well are two observation wells; observation well A is located 8m from the pumping well and B is located 24m from the pump- ing well. The heads in these wells are hA = 134.20 and hB = 134.28 m. You know from prior pumping tests of the well that the well and the observation wells are screened in a confined aquifer with transmissivity T = 1200 m2/day. Assuming that without the well pumping there would be no hydraulic gradient at all, what is the pumping rate of the well?
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A confined aquifer has a transmissivity T = 200 ft2/day (18.6 m2/day) and a storativity S = 0.0002. A fully penetrating well begins pumping in this aquifer at a rate of 1500ft3/day (42.5m3/day). Using the Theis solution predict the drawdown h0 h at a radius of r = 100 ft (30.5 m) at the following elapsed times: 10 minutes, 1 hour, 5 hours, and 24 hours. *tip* Spreadsheet software could help you do these repeated calculations.
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31 Yuri wants to determine the permeability of an aquifer. The aquifer has a test well 300-mm in diameter with two observation wells. A pumping test was conducted for 24 hours with the discharge being held constant at 5,721.4 m^3/day. The first one, 81.07 meters from the test well, has a draw-down of 0.6 meters. The second one, 40 meters from the test well, has a draw-down of 1.43 meters.The static water table penetrates the well to a depth of 25 meters. Determine the radius of influence of the aquifer in meters. Round off to three decimal places.